Oyaide NRF-005L Noise Suppression Sheet

The Oyaide NRF-005L is a revolutionary noise suppression material that does not use any magnetic materials. It suppresses electromagnetic noise and radiation noise generated from AV equipment and cables, and reproduces sound closer to the original sound. Groundbreaking noise suppression material that solves the dilemma of noise suppression and original sound fidelity.

Oyaide Electric will release a new noise suppression sheet "NRF-005L" using PULSHUT® (highly functional non-woven fabric) developed by Asahi Kasei Corporation. Following the tape type "NRF-005T," which has been well-received since its release in 2022, the new "A4 size sheet type" has been requested by many customers.

While NRF-005T is suitable for wrapping electric wires and attaching ICs and electronic components, NRF-005L is suitable for attaching to large areas such as inside and outside of chassis and around the base of audio equipment.

Once again, our emphasis is on avoiding "no fish in a clear water". Audio accessories that claim to absorb noise must be carefully designed, or they may filter out the nuances and realism that should be present in music and video, and cause the music or video to lose its life.

The NRF series solves the dilemma of noise reduction and original sound fidelity, and offers a revolutionary and innovative product for all audiophiles.

NRF-005L is A4 size (297 x 210 mm) and features a highly versatile sheet form. PULSHUT® is extremely thin (0.05 mm thick) and highly flexible, so it can be cut to any desired size. Of course, there is no problem even if you attach an A4 sheet as it is.

Features

• High performance non-woven fabrics that do not contain any magnetic material.
• Effective against noise in a wide frequency range from MHz to GHz bands.
• Substrate is as thin as 0.05 mm and extremely lightweight.
• Excellent flexibility and can be attached to uneven surfaces.
• Both the sheet surface and the cut surface have high insulation properties, so it can be attached to conductive surfaces.
• Made in Japan

What is "PULSHUT®" ?

Conventional noise suppression materials have the property that the amount of noise suppression can be controlled by adjusting the magnetic material and the amount of magnetic material used. They have high magnetic loss characteristics and achieve their noise-absorbing effect by converting electromagnetic noise into heat. On the other hand, the impedance in certain frequency bands increases, which also affects the original sound waveform. This is similar to the properties of ferrite cores. This means that, as with EMC/EMI countermeasures, appropriate noise countermeasures were necessary for audio as well.

PULSHUT® is a highly functional non-woven fabric with a special surface treatment that provides high noise suppression performance despite its non-magnetic nature. This characteristic makes it possible to suppress only the noise component while minimizing the effect on the original sound waveform.

Measurement of Acoustic Characteristics

In verification data (Red Line is measurement with PULSHUT attached) on a related product called Asahi Kasei PULSHUT® MU (support changed to PP), which uses PULSHUT® as the base material, harmonic distortion analysis (1 kHz) showed that the energy levels other than signal waves were reduced by approximately 4.71 db, and pink noise analysis results showed almost no change in sound pressure levels. The pink noise analysis results showed almost no change in sound pressure levels.

These results show that PULSHUT® has a reduced effect on the original sound waveform and acts only on the noise component. *Measurement results are representative values and are not guaranteed.

The Differences between “NRF-005T” and MWA Series

Oyaide Electric has the Sendust alloy-based electromagnetic wave absorber MWA Series, which has already been well received by customers. MWA Series is one of the excellent noise suppression materials widely used within Oyaide products as the key to sound quality adjustment.

PULSHUT® is a completely new noise suppression material and therefore has a number of characteristics that differ from those of MWA series. By determining the right material for the right job from the properties of each material and using them together in your own environment, they can contribute to improving the S/N and demonstrating the potential of your audio system.

Excellent noise absorption with simple use

It is very easy to use. By attaching it to the input/output terminals of audio equipment, around noise-prone areas, and on cables and plugs, it exerts a highly effective noise suppression effect. It lowers the noise floor without deforming or distorting the waveform of the original sound, and improves delicate expression with fewer incidental sounds. In addition, the effect on video is to reduce blurring of contours and increase the clarity of colors. In sound quality, the S/N ratio is improved, the center of gravity is stabilized, the localized sound image is brought into focus, the sense of noise filling the air space is eliminated, and the sense of sound field is expanded.

Flexible workability, cut and paste with scissors

Easily cut with scissors, etc., and has excellent flexibility, making it possible to affix to curved surfaces such as cables, etc. Excellent processability and workability.

The acrylic adhesive has reworkable adhesive strength, yet has sufficient holding power and can be reattached many times.

PET resin is used for the support, which keeps a stable shape even after cutting, and non-woven fabrics can be attached without fraying. The key to a beautiful finish is to apply a light tension while attaching.

Specifications